Final answer:
A developer needing a base flood elevation for a new subdivision downstream of Dean Lake should submit a request to the Army Corps of Engineers for a floodplain study to determine flood risks and comply with floodplain management regulations. correct answer is 4.
Step-by-step explanation:
If a developer downstream of Dean Lake is looking to build a 40-acre subdivision that crosses Ireland Creek and needs a base flood elevation for review, one option is to submit a request to the Army Corps of Engineers for a floodplain study. This study would provide critical information on the flood risks and base flood elevation necessary for planning and compliance with local, state, and federal regulations.
The Army Corps of Engineers is equipped to perform detailed hydraulic and hydrologic studies to determine floodplain boundaries and base flood elevations. In addition, the submitted floodplain study helps in understanding the potential impacts on flooding conditions due to the proposed development. This essential step ensures that the development does not increase flood hazards and adheres to the National Flood Insurance Program (NFIP) criteria and other floodplain management requirements.
By obtaining a detailed analysis of the floodplain, the developer can make informed decisions on the site's suitability for a subdivision and can design appropriate mitigation measures to manage flood risk, like elevating structures, ensuring adequate drainage, and preserving natural floodplain functions.